Double car-roof



No. 617,289. Patented Jan. 3,118.99.

6. H. HUTBHINS. DOUBLE GAR ROOF.

(Applic'ation filed. May 81, 1898 (No Model.)

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No. s|7,2a9. Patented Ian; 3, I899. c. H. HUTC'HIN'S.

DOUBLE CAB ROOF.

(Application filed May 31, 1898.)

SPECIFICATION forming part of Letters Patent No. 617,289, dated January 3, 1899.

Application filed May 81, 1898.

T0 at whom it may concern.-

Be it known that I, CHARLES H. HUTOHINS, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Double Oar-Roofs, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to the construction of so-called double roots, in which a sheet-- metal covering is provided beneath the usual wooden covering and separated by an airspace therefrom. The advantages of such double roofs are well understood, but the constructions in present use have not given satisfaction as to their durability. I have discovered the reason in the fact that on account of the metal plates being rigidly secured or held in place by the roof-frame, and thus being made a structural element of the roof, the rigidity of the same has been increased in a manner to make such. roofs particularly liable to receive injury from severe shocks and jars to which freight-cars are frequently subjected in switching or from other causes incidental to their use, and the difference in the character of the two materials causes the metal plates to tear loose and form open joints and leaks in the metal covering, while at the same time the unequal strains produced thereby between the wood and metal injuriously affeet the Whole structure. The unequal expansion and contraction of wood and metal under the influence of heat and cold is also a destructive feature in such roofs, and while this, had been sought to be overcome by constructing the metal covering of a number of disconnected plates the advantage of a continuous metal roof Was sacrificed and the chances of leakage increased.

The object of my invention is to remedy these defects and to give further advantages in the facility of repairing such roofs, which frequently aresubjected to accidents resulting in local injury to the metal covering, which in the present construction cannot be repaired without practically necessitating the rebuilding of the entire roof.

To this end my invention comprises the construction and arrangement of the metal covering of the roof and the manner of com- Scrial No, 682,141. (No model.)

bining it with the frame thereof, all as more fully hereinafter described, and particularly set forth in the claims.

In the drawings which illustrate a practical embodiment of my invention, Figure 1 is a plan View of my improved car-roof with a portion of the wooden sheeting removed. Fig. 2 is a vertical cross-section on line a: as, Fig. 1. Fig. 3 is a vertical longitudinal section on line y y, Figs. 1 and2; and Fig. 4: is another vertical cross-section on line a 2', Figs. 1 and 3. I

A represents the carlines of the roof, B the purlins, B the ridg'e-purlin, O the plates, D the siding secured to the plates, and F the facia, all arranged to form a supporting roofframe.

E are the metal plates forming the metal covering of the roof. Each plate is of a length to extend from the center of the roof to the outer edge and has formed along one side a standing flange a and along the opposite side an inverted-U-shaped flange b, adapted to embrace the flange a of the adjacent plate; and in this manner a number of plates of suitable width are joined together to form a complete metallic covering for the whole roof, and this covering is in no way attached to any part of the roof-frame upon which it is supported and rests freely thereon without being in any way united thereto. Above the metal roof thus formed the supersheeting is supported in the following manner: On top of the metal plates are placed the supercarlines G, which in length are coextensive with the metal plates, and on top of these are placed the superpurlins H, which at the point of intersection with the supercarlines are secured thereto by nails I or otherwise.

Upon the ridge-purlins B a superridgepurlin H is placed and secured thereto by bolts J or otherwise, and preferably a packing K interposed between the two to form a water-tight joint along the center of the metal roof. In this manner a superframe is formed, upon which the usual sheeting L of boards is secured, and upon this the footboard M, supported on sill-hooks, is arranged in the usual way.

Along the sides, close under the eaves of the sheeting, is secured removably, by screws or otherwise, an outside facia O, with small spacing-blocks P interposed between it and the facia F in such manner as to form an airpassage Q, communicating with the air-space R, formed between the metal covering and the Wooden sheeting on top, and a free drip for any Water which may collect on the metal plates. By this construction the metal plates are entirely free and disconnected from the framework of the roof, and the joints of the plates permit such a free adjustment of one plate in relation to another as will preclude any transmission of shocks and jars from one to another.

The metal plates of the root instead of performing the ofiice of braces in the structural arrangement of the roof, as they do in present constructions, are thus eliminated as a factor which impairs the flexibility of the Wooden portion, and thereby its ability to withstand the hard usage which it is subjected to under the various contingencies of its use. At the same time the metal roof is continuous and its durability is assured, and should occasion require to perform any local repair to any portion of the metal covering all that is required is to remove the outer facia, which retains the plate and pulls the plate out endwise.

\Vhat I claim as my invention is- 1. In a double car-roof, the combination of a main roof-frame supported upon the car sides and comprising purlins and carlines, a continuous sheet-metal covering laid upon said carlines and formed of a series of platesections extending from the eaves to the ridge,

standing joints formed at the edges of the sections which form sliding connections between the same, and an upper roof-frame having carlines resting upon said plates directly above the carlines of the main frame, purlins connecting said carlines, a roof-covering on the purlins, and a detachable facia at the outer ends of the superroof, the sections of the sheet-metal covering being removable upon the removal of said facia.

2. In a double car-roof, the combination of a main roof-frame supported upon the sides of the car and comprising purlins and carlines, a continuous sheet-metal covering laid upon said carlines and formed of a series of plate-sections extending from the eaves to the ridge, standing joints formed at the edges of the sections which form sliding connections between the same, an upper roof-frame having carlines resting upon said metal plates vertically above the carlines of the main roofframe and adjacent to said standing joint, purlins connecting said carlines, a rooflcovering on the purlins, and a detachable facia at the outer ends of the superroof, the sections of sheet metal being removable upon the removal of the facia.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES H. HUTOHINS.

\Vitnesses:

GEO. S. MOKAY, W. D. THOMPSON. 

